JP4678893B1 - Intake mechanism of Sabo Dam - Google Patents

Abstract

[PROBLEMS] To provide a water intake mechanism for a sabo dam that is simple in structure and requires almost no maintenance, and that can withstand long-term use without being damaged by driftwood, rocks, etc. It is something to try.
A water intake facility comprising a hollow body attached with a water intake pipe arranged on the upstream side of a sleeve portion of a sabo dam, and a dust removing screen attached to an opening provided on the upstream side thereof;
A sand exhaust pipe that communicates with one chamber of the hollow body of the water intake facility and is piped through an existing drain hole,
Intake of a sabo dam that enables continuous water intake by forming and maintaining a water pool around the water intake facility by transporting and discharging sediment around the water intake facility to the downstream side along with running water. mechanism.
[Selection] Figure 1

Description

The present invention relates to a water intake mechanism of a sabo dam that uses existing water drainage holes existing in the sabo dam to discharge the sediment around the water intake to the downstream side to form and maintain a water intake pool. .

The function of the sabo dam is to store a large amount of sediment on the upstream side during floods and protect the downstream side from sediment disasters. At the same time, however, it is one of the important functions of the sabo dam to allow the stored sediment to flow down after the flood and quickly restore the sand storage capacity to prepare for the next flood. Therefore, when water intake from the Sabo Dam is planned, it must be assumed that a large amount of earth and sand will come near the water intake facility. On the other hand, the sabo dam is usually provided with several drain holes directly under the water passage.

The following prior art is known as the sand discharge means of the sabo dam as described above.
First, in Japanese Patent Laid-Open No. 2000-273749 (see Patent Document 1), in a sabo dam that dams earth and sand flowing from upstream, a dam body that divides upstream and downstream, and an upstream side that reaches this dam body A discharge opening penetrating the dam body so as to connect the lower end of the downstream slope formed on the river bottom and the river bottom position on the downstream side of the dam body; A tilting slope that is located on the same horizontal plane as the river bottom and that has a tip that tilts toward the discharge opening around the pivot shaft provided at the upper end of the descending slope when earth and sand are discharged, and tilts the tilted slope There is described a sabo dam characterized by having a drive mechanism.

Japanese Patent Laid-Open No. 2000-297420 (see Patent Document 2) discloses that the upstream end is open to the sediment at the bottom of the water storage dam, and the downstream end extending beyond the top of the dam body is lower than the water storage dam bottom. Lay the drainage pipe that opens to the sediment delivery site in the lower position through the spillway of the dam body, close the spillway gate, and raise it to the height above the highest part of the sewage pipe. By raising the water storage level, water is introduced into the sand discharge pipe to fill the inside of the pipe, causing the natural flow of water due to the pressure difference between the upstream end and the downstream end of the sand discharge pipe. The siphon is characterized in that the upstream end opening of the sand pipe abuts against the sediment and the sediment is sucked into the sand discharging pipe by the flow of natural flowing water into the sand discharging pipe and discharged from the downstream end opening of the sand discharging pipe. Describes the sand draining method of the reservoir dam using the principle.

In JP 2004-308377 A (see Patent Document 3), a power generation water pipe having a siphon function between the upstream side and the downstream side of a dam dam body and a pipe with openings that open both front and rear ends are assembled. The front opening end of the pipe with the opening is positioned on the upstream side of the dam dam body, the rear opening end of the pipe with the opening is positioned on the downstream side of the dam dam body, and the opening The pipe with the opening is arranged at a lower position in the vicinity of the water intake of the power generation water pipe, and the upstream side of the pipe with the opening by the negative pressure generated as water flows in the pipe of the pipe with the opening A method and apparatus for removing sediment in the vicinity of a water pipe intake that draws sediment and sediment in the lower part of the power generation water pipe and the surroundings from the pipe opening when water flows in from the open end is described. Yes.

A mechanism for preventing clogging of the drainage hole of the sabo dam as shown in JP-A-4-289313 (see Patent Document 4) has been proposed. It is intended to prevent clogging and maintain the drainage function, and is not intended for the sand discharge of a sabo dam as intended by the present invention.

JP 2000-273849 A JP 2000-297420 A JP 2004-308377 A JP-A-4-289313

That is, in Japanese Patent Application Laid-Open No. 2000-273749, an operation mechanism such as a drive mechanism for tilting a tilted slope is required, maintenance is unavoidable, and it is not suitable for applications such as a sabo dam.
Further, in the case of using the siphon principle disclosed in Japanese Patent Application Laid-Open No. 2000-297420 and Japanese Patent Application Laid-Open No. 2004-308377, it is necessary to dispose a sand drain pipe beyond the top of the dam body. There is a problem in that it is easily damaged by driftwood or rocks that are washed away by the sea, and cannot be used for a long time.

Therefore, the water intake mechanism of the sabo dam according to the present invention is simple in structure, requires almost no maintenance, and can withstand long-term use without being damaged by driftwood or rocks that are washed away by floods. It is intended to provide a water intake mechanism for naval sabo dams.

That is, the water intake mechanism of the sabo dam according to the present invention is a water intake facility provided with a hollow body attached with a water intake pipe arranged on the upstream side of the sleeve portion of the sabo dam, and a dust removing screen attached to the opening surface provided on the upstream side thereof,
A sand exhaust pipe that communicates with one chamber of the hollow body of the water intake facility and is piped through an existing drain hole,
By transporting and discharging sediment around the water intake facility to the downstream side along with running water, a water pool is formed and maintained around the water intake facility, enabling continuous water intake.

The water intake mechanism of the sabo dam according to the present invention includes a hollow body having a water intake pipe disposed on the upstream side of the sleeve portion of the sabo dam, and a water intake facility having a dust removal screen attached to an opening provided on the upstream side thereof,
The sand removal pipe communicated with one chamber of the hollow body of the water intake facility and piped by using an existing drain hole as a part of the sand removal pipe,
It is also characterized by enabling continuous water intake by forming and maintaining a water pool around the water intake facility by transporting and discharging the sediment around the water intake facility to the downstream side along with running water. .

As described above, a hollow body having a water intake pipe disposed on the upstream side of the sleeve portion of the sabo dam, a water intake facility having a dust removing screen attached to an opening surface provided on the upstream side thereof, and a hollow body of the water intake facility A water intake facility with a simple structure was installed at the appropriate location of the sabo dam, and was connected to the existing drain hole. By piping the sand discharge pipe through the inside, it becomes possible to discharge the sand control dam without difficulty.
On the other hand, it is possible to avoid damage to the water intake facility and the sand pipe during a flood. If the floods converge, it will be possible to resume sand removal.

Since the present invention is configured as described above, it has a simple structure, requires almost no maintenance, and can be used for a long time without being damaged by driftwood or rocks that are washed away by floods. It became possible to provide a water intake mechanism for a large sabo dam.

In addition, when the sand drain pipe is passed through the existing drain hole or when the existing drain hole is used as a part of the sand drain pipe, it is only necessary to extrude the soil that clogs the existing drain hole. Since it can be easily installed or opened, it is easy to install a sand drain pipe or open an existing drain hole, and it takes little effort to install the water intake mechanism of the sabo dam of the present invention.

It is a front view at the time of sand discharge which shows embodiment of the water intake mechanism of the sabo dam of this invention. FIG. It is a schematic side view explaining the internal structure. It is a side view at the time of the sand discharge which shows other embodiment of the water intake mechanism of the sabo dam of this invention.

Embodiments of a water intake mechanism for a sabo dam according to the present invention will be described below in detail with reference to the drawings.
As shown in FIGS. 1 to 3, the water intake mechanism of the sabo dam according to the embodiment of the present invention includes a hollow main body 21 disposed on the upstream side of the sleeve portion 12 of the sabo dam 11 and an opening surface 22 provided on the upstream side thereof. A water intake facility 13 having a dust removing screen 23 attached to the water is provided.
In the water intake facility 13, a hollow main body 21 is made of concrete or the like, and a metal dust removing screen 23 having a vertically long slit is attached to an opening surface 22 provided on the upstream side of the first chamber 21a. In addition, the opening surface 22 includes a front wall 24 in which the hollow main body 21 is raised at a lower portion thereof, so that flowing water that has passed through the dust removing screen 23 flows directly into an opening end 14a of the sand discharge pipe 14 described later. It has become. A water intake pipe 16 is attached to a second chamber 21 b provided adjacent to the first chamber 21 a of the hollow body 21.

In the water intake mechanism of the sabo dam configured as described above, water intake and sand discharge are performed by operating the valve 14b provided at the open end 14a of the sand discharge pipe 14 and the valve 16b provided at the open end 16a of the water intake pipe 16, respectively. It has come to be.
That is, at the time of water intake, if the valve 14b provided at the open end 14a of the sand discharge pipe 14 is closed and the valve 16b provided at the open end 16a of the water intake pipe 16 is opened, water can be taken in as it is. On the other hand, when the sand is discharged, the valve 16b provided at the opening end 16a of the intake pipe 16 is closed and the valve 14b provided at the opening end 14a of the sand discharging pipe 14 is opened, so that the sand can be discharged without difficulty.

In the first chamber 21a of the hollow main body 21 of the water intake facility 13 according to the present invention, a sand discharge pipe 14 made of a steel pipe or the like is disposed so as to communicate therewith, and the sand discharge pipe 14 is placed in an existing drain hole 15. Piping through.
Thus, when the sand drain pipe 14 is passed through the existing drain hole 15, the sand drain pipe 15 can be easily installed simply by extruding the clogged soil.
In the water intake mechanism of the sabo dam of this invention, a water pool is formed around the water intake facility 13 by transporting and discharging the earth and sand around the water intake facility 13 to the downstream side through the sand discharge pipe 14 together with running water. In addition, the continuous water intake from the water intake pipe 16 is made possible in such a manner as to be maintained.

FIG. 4 shows another embodiment of the water intake mechanism of the sabo dam according to the present invention.
The water intake mechanism of the sabo dam of this embodiment is similar to the previous embodiment in that the hollow main body 21 disposed on the upstream side of the sleeve 12 of the sabo dam 11 and the opening surface 22 provided on the upstream side of the first chamber 21a. A water intake facility 13 having a dust removing screen 23 attached to the water is provided.

On the other hand, the hollow body 21 of the water intake facility 13 is disposed so as to communicate with a sand discharge pipe 14 made of a steel pipe or the like, and the sand discharge pipe 14 is piped so as to communicate with an existing drain hole 15. .
As described above, when the existing drain hole 15 is used as a part of the sand discharge pipe 14, it can be easily opened simply by extruding the soil clogging the existing drain hole 15.
In the water intake mechanism of the sabo dam of the present invention, the earth and sand around the water intake facility 13 is transported and discharged to the downstream side along with flowing water through the sand discharge pipe 14 and the existing drain hole 15, thereby A water pool was formed and maintained in the periphery, and continuous water intake from the water intake pipe 16 was made possible.

Since the intake mechanism of the sabo dam according to the present invention is configured as described above, the structure is simple and maintenance is easy, and drainage from the sabo dam and sand discharge when sedimentation occurs can be easily performed. It is possible to provide a water intake mechanism for a simple sabo dam.

11 Sabo Dam 12 Sleeve 13 Water Intake Facility 14 Drainage Pipe 14a Open End 14b Valve 15 Drain Hole 16 Water Intake Pipe 16a Open End 16b Valve 21 Hollow Body 22 Open Face 23 Dust Removal Screen 24 Front Wall

Claims (2)

A water intake facility equipped with a hollow body attached with a water intake pipe arranged on the upstream side of the sleeve portion of the sabo dam, and a dust removing screen attached to an opening surface provided on the upstream side,
A sand exhaust pipe that communicates with one chamber of the hollow body of the water intake facility and is piped through an existing drain hole,
Intake of a sabo dam that enables continuous water intake by forming and maintaining a water pool around the water intake facility by transporting and discharging sediment around the water intake facility to the downstream side along with running water. mechanism. A water intake facility equipped with a hollow body attached with a water intake pipe arranged on the upstream side of the sleeve portion of the sabo dam, and a dust removing screen attached to an opening surface provided on the upstream side,
The sand removal pipe communicated with one chamber of the hollow body of the water intake facility and piped by using an existing drain hole as a part of the sand removal pipe,
Intake of a sabo dam that enables continuous water intake by forming and maintaining a water pool around the water intake facility by transporting and discharging sediment around the water intake facility to the downstream side along with running water. mechanism.

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